Tuyere block



A. WATHEY May 30, 1933.

TUYERE BLOCK Filed June 26,

Patented May 30, 1933 PTEN ARTHUR WATHEY, OF LAKEVJ'OOD, OHIO TUYEBEBLOCK Application filed June 28,

This invention relates to improvements in tuyere blocks such as areadapted to be arranged in inclined tiers for supporting fuel and foradmitting air to the fuel bed of a stoker.

One of the objects of the invention is the provision of a block of thischaracter which may be cast with facility and which shall be capable ofwithstanding high heats without burning out.

A further object is the provision of a depending rim upon, the forwardedge of the block through which the tuyere openings are caused toextend, and from which the P081 tioning hook depends.

Another object is the arrangement of the tuyere openings with theirforward ends depressed somewhat so as to direct the air onto the uppersurface of the block next below.

Other objects and features of novelty Wlll appear as I proceed with thedescription of that embodiment of the invention which, for the purposesof the present application, I have illustrated in the accompanying drawing, in which Figure l is a bottom plan view of a tuyere block embodyingthe invention.

Fig. 2 is a front edge View of the same.

Fig. 3 is a bottom perspective view of the block, and

Fig. 4 is a side elevational view, partly in longitudinal section,showing several blocks in the positions which they take relatively whenassembled in a stoker.

In tuyere blocks of the general nature of that illustrated in theaccompanying drawing, wherein each block is provided at its forward endwith a depending hook which takes into a vertical opening in the blocknext beneath for the purpose of properly positioning and holding thevarious blocks relatively to each other, I have found that the necessityfor replacement of blocks results generally from a burning out of thenose of the block. This difficulty is overcome in the present inventionin two ways, first by causing one of the tuyere openings to pass throughthe block directly above the hook, being equivalent in fact to anopening formed 50 through the hook itself. The air thus di- 1930. SerialNo. 463,973.

rected through the mid portion of the nose of the block serves to coolthe same and prevent burning. Secondly, the tuyere openings ar rangedthroughout the nose of the block are deflected downwardly, so that theair passingthrough these openings is directed onto the upper surface ofthe block next beneath, having a consequent cooling effect. The nose ofeach block is therefore cooled both from above and below. 9

In the drawing, the block is shown as embodying an upper plate-likeportion 10 which is of substantially equal thickness through out and isflat through the major portion of its extent but may be tapereddownwardlyto 5 a slight extent at its forward end as indicated at 11.

At the nose of the block there is a depend ing rim portion 12, whichextends rearwardly on each side approximately one-fourth Z9 the lengthof the block. In it are formed a series of horizontally arranged slots13, the central one extending directly forward, and those on either sideextending somewhat laterally as well as forward. These slots. are 31.all deflected downwardly to a slight degree, as indicated in Fig. 4. IDepending from the rim portion 12 and formed integrally therewith is ahook 194 which is positioned in the middle of, the block directly belowthe central'one of the slots 13. When the blocks are assembled .in astoker each hook 14 takes into a vertical opening 15 in the blocknextbeneath. The opening 15 is preferably surrounded by a reenforcingrib 16 which extends. down wardly from the plate portion 10.

Behind the rim 12 on either side of the block I form a series of ribs17, inclined outwardly toward the front, so as to provide 9 forwardlyand outwardly extending air passages, and behind these ribs on eitherside of the block is a ledge 18 of the same height or depth as the ribs17 and rim 12. These ledges are beveled off at 19. lVhen the blocks areassembled in a stoker the beveled edges 19 form a substantiallycontinuous surface which is adapted to rest upon supporting ribs in thestoker frame (not shown). A

As an additional positioning and holding 55 means, I may provide atongue 20 extending downwardly from the lower surface of the plateportion 10 midway between the sides of the block, this projection beingadapted to take into a hole 21 near the rear of the plate portion 10 ofthe block next beneath.

The tuyere openings 13, being horizontal slots, provide the maximumpossible air passages, and since they extend directly through the noseof the block instead of being positioned along the upper surface orlower surface thereof, they enable the air to effect the greatestpossible cooling of the block nose. The construction is also such thatthe cooling of the nose is not interrupted at the mid portion thereof bythe positioning hook 142. The inclined portion 11 of the nose of eachblock is therefore cooled by air passing through the block directlybelow it and also by air directed onto its upper surface by the tuyereopenings of the block next above.

While in the foregoing description and in the accompanying drawing Ihave disclosed more or less in detail one particular embodiment of theinvention, I desire it to be understood that such detail disclosure hasbeen resorted to primarily for the purpose of fully illustrating theinvention in accordance with the requirements of the statute, and thatit is no to be construed as amounting to any limitation upon the scopeof the invention.

Having thus described my invention, I claim:

1. A tuyere block having a thickened nose portion provided with a tuyerehole extending therethrough centrally from front to rear, and acentrally positioned hook extending downwardly from said thickened noseportion, said lock having an opening therethrough behind said noseportion adapted to receive the hook of the block next above.

2. A tuyere block having a thickned nose portion, and an integral hookextending downwardly from said thickened nose portion, said nose portionhaving a tuyere holeextending therethrough directly above said hook, andsaid block having an opening therethrough behind said nose portionadapted to receive the hook of the block next above.

In testimony whereof, I hereunto afiix my signature.

ARTHUR WATHEY.

